| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a water-based lithium secondary battery having large charge/discharge capacity, and having an excellent charge/discharge cycle characteristic. <P>SOLUTION: This water-based lithium secondary battery has a positive electrode 2, a negative electrode 3 and an aqueous electrolytic solution. The positive electrode 2 contains a lithium-manganese complex oxide of an olivine structure represented by formula: LiMn<SB>1-x</SB>M<SB>x</SB>PO<SB>4</SB>(wherein, M is one or more kinds selected from Fe, Co, and Ni; and 0≤x≤0.5) as a positive electrode active material. The negative electrode 3 contains a substance having lower storage and desorption potential of lithium than the lithium-manganese complex oxide of the olivine structure represented by the formula as a negative electrode active material. The aqueous electrolytic solution is prepared by dissolving a lithium salt into water. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
